Parent Layer: Background Air Pollution 2018-2030

Name: Nitrogen Oxide (NOx)

Display Field: X

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Air pollution background concentration maps are published by Defra and the Devolved Administrations to assist local authorities in carrying out Review and Assessment of local air quality as part of their duties under the Environmental Act 1995 as amended by the Environment Act 2021.The main purpose of the background maps is to provide estimates of background concentrations for specific pollutants. These can then be used in air quality assessments to better understand the contribution of local sources to total pollutant concentrations. They provide information on how pollutant concentrations change over time and across a wide area; they also provide an estimated breakdown of the relative sources of pollution. The maps allow for the assessment of new pollutant sources that are introduced into an area and the impact they may have upon local air quality.Background maps are updated by Defra periodically due to updates to underlying data, including emissions factors. Local authorities should use the most up-to-date data and supporting tools made available.UK background maps are made available for a reference year and projection years for a range of pollutants including oxides of nitrogen (NOx), nitrogen dioxide (NO2) and particulate matter (PM10 and PM2.5).The current base reference year for the data is 2018 and the projections are available up until 2030 for NOx, NO2, PM10 and PM2.5. Available as 1x1km grid file of concentrations for each local authority (per pollutant). Maps are used for all new air quality assessments.

Copyright Text: © Crown 2023 copyright Defra via uk-air.defra.gov.uk, licenced under the Open Government Licence (OGL).

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XMin: 444000.00009999983
YMin: 322000.00009999983
XMax: 489000.00009999983
YMax: 401000.00009999983
Spatial Reference: 27700  (27700)  LatestVCSWkid(0)

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Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• X ( type: esriFieldTypeInteger, alias: X )
• Y ( type: esriFieldTypeInteger, alias: Y )
• TOTAL_NOX_2018 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2018 )
• TOTAL_NOX_2019 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2019 )
• TOTAL_NOX_2020 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2020 )
• TOTAL_NOX_2021 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2021 )
• TOTAL_NOX_2022 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2022 )
• TOTAL_NOX_2023 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2023 )
• TOTAL_NOX_2024 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2024 )
• TOTAL_NOX_2025 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2025 )
• TOTAL_NOX_2026 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2026 )
• TOTAL_NOX_2027 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2027 )
• TOTAL_NOX_2028 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2028 )
• TOTAL_NOX_2029 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2029 )
• TOTAL_NOX_2030 ( type: esriFieldTypeDouble, alias: TOTAL_NOX_2030 )
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• SHAPE_Length ( type: esriFieldTypeDouble, alias: SHAPE.LEN )

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